Car-brake device



Sept. 13, 1927- J. McMULLEN CAR BRAKE DEVICE Filed Jan. 20, 1927 WV NTOR140/ ATTORNEY brakemechanism in diagrammatic outline, together with ahandbrake, so. as to indicate 55 entendingtothesheave or pulley B,around Patented Sept. 13 .1927.

z ED; STATES PATENTFOFFICB,

* JOHN memunnnnsor BU-rrAno, NEwYoRx. s

I CAR-BRAKE DEVICE. c

I {M n ain dma 20,11927. SerialNo. 162,247.

My present inventionrefers a brake deg viceior railway carsandothervehicles, and more particularly to mechanical means for windingup the chain; which connects a manuallyeoperated brake wheel orequivalent .leveror other manual device with the leverage mechanism orconnection communi cating motlon to the shoes; a leading ObJBCt amongmany that; might be mentioned being to r-provide means IiqrlelfeictiVely applying 1 the hand brake appliances "when the same are.required-lfor use emergencyor other cans f and Itogthis end taking upthe loose chainor connection, so that the brake shoes may be instantlyset by hand, particularly in a case where the 'airfails, and so set'with 4 equipment with my specialimproved brake applying connectionsarranged therewith.

Figure2 an enlarged detailed plan View of the linkQfeatures which assistin tightly and quickly winding up the chain. 7 Figure 3j'is anedge viewof the same.

Figure 1' is a cross sectional plan view-of the interpivoted, linkmembers folded together and. with the brake chain partly oundiup.

Figure 5 is. a cross-s ction on the line 5,

Ian view, and Figure 7 a side-or edge view ofan. alternate form of "theinvention. a

f Similar characters of reference designate like parts throughout allthefigures of the drawing; 7 v

;In Figure 1 Ihave shown a form of air how my improved car brake devicesare arranged to function. In. this view A denotes the brake' cylinderon. a car C the brake cylinder piston rod; D the cylinder lever, fromwhich runs the lever G for actuatingthe brake shoes (not indicated); F[an outline of'leverage connected at 13 to the car,'and having anactuating rod or lever E 'proved car brake device.

which 'is firmly attached at'12 to the car body, while the other end iscommonlyiand' usually attached to the brake'post 1', "which post carriesthe hand wheel 11, but in my 1 which passes the 'brake'chainon e" end of,h a

improved device the chain 4 is not attached directly to the post 1 butis connected to 'the end of a fiat extended link connection or member 5,which is pivoted to another similar flat link, arm, lever, or member-'6,which 2 ona sleeve v is in turn pivoted to a'lug or hub 3 secured to'postlby a bolt9, pin,

or any other suitable means which passes through a hole in the post 1and proper coinciding holes in the hub 3; Of course it willberrecognized that the mechanism of the a air brake andthe leverstherefor and'for the brake shoes is portrayed onlyfdiagram-'1natically,'and all the detail mechanism is not shown; as that would beunnecessary,

as I only need to indicate'the relation to vi such parts in a generalway of the brake chain and the 'interpivoted links serving with thebrakewheel on this post,so as to explain'the novelty and value of my im- The'brakepost 1 provided with its hand I 7 wheel 11 is supported in anycustomary or convenient part of a car or other conveyance, as forinstance the platform of a pas senger coach or the top of a freight car,

and may have a pawl and ratchet and other suitable details which it isunnecessary-to show here. Secured to the post 1 is a sleeve or'hub 3,'through which the post 1 passes,

the post 1 and hub 3 being securely fastened together by a bolt and nut9, a pin or dowel passing through an opening in hub 3 and a co-in'cidentopening'in post 1. The hub 3 in its manufacture has one end of the blankright angle to provide a shortfiat lug 2,

which is pivoted by meansof a rivet form of pivot 7 I to a connectingflatextende'd link member 6, which is pivoted to another similar flatlink member 5 byapivot 8, said member 5 being pivoted by a pivot 10 to.the first ordinary loose link of the chain 1. The two interpiv'oted flat link members 5 and '6,wliich cooperate with thechain i, are

strap from which it is formed turned at a a the essential features of myinvention, when combined withthe chain and otherfchief parts of a carbrake device. They may be made in a variety of diiierent' ways, but

they usually consist each of two parallel :flat plates or stripsconnected in one case by a. rib 5" and in the other case by a rib 6, soas to provide slots in and 6* respectively, each of the llat links 5 and(3 being thus made of a single integral piece of metal bent upon itselfin a U-lorin, this term giving strength and being convenient toinanufacture.

The ends of the links 5 and b are seinewhat flared or projected on anangle with ars that are perforated to receive respectively the bolts orpivots 7, 8, and 10. See Figure The lirst regular loose chain link ofthe chain ll enters between the companion horizontal plates of link 5 inthe slot 5 and is loosely held by the pivot 10. As stated the ends oi?the link 5 are bent more or less as shown and those nearest the link (5interengage with similar bent ends of link 6, by enteringlslot- (3, alloil said ends of the links being perforated to receive the proper pivotor bolt, while the other ends of the link 6 receive within the slot (3the lug 2 which is pivoted therein by pivot bolt 7. The engagement ojtlink 5 with link (3 is preferably as shown in .l 'igure 25 where thelower member of link 5 is below the lower member of link 6, so as tobring the chain et lowerdown and enable it to clear the hub 3 and winddirectly on the post 1 when'it is being wound up.

f Thus it clan: that the two important U-sllaped :[latelongated andslotted interpivoted link members 5 and t; which connect the hub andpost l with the windaip chain Al constitute devices that are rigid ornonflcxible vertically but are iii'oldable and flexible horizontally so,as to wind up the chain by first taking up the slack by the folding upot the special link members and bring the chain devices l or otherconnection right up against the post 1 so that it may wind thereon whensaid post is rotated by the hand wheel 1. in this way the chain Jr. willnot spiral. down the shall to the stirril p at which point it woulddouble over itself and greatly diminish the braking power, but in: myimproved device it will wind on the post 1, as upon a member ol? smalldi- :UDGtOl'.

When the hand brake is called upon itor use the list turn of the wheel11 and its post 1 will more the inter-pivoted flat links 5 and (5:l'roni the extended position shown in Figures 2 and S te the toldedposition in Figure l, where the chain at has been brought directly up tothe post 1, all the looseness being now out of the chain as shown inFigure at and the chain. being ready to wind on the ill 1. It is obviousthat the continued rotation of the wheel 11 and thestall 1 will causethe chain to wind round the stall l, andthe tightening of the chain willbe done gradually and by the winding ol the same upon a. member of smalldiameter, which will increase the force with which the shoes are appliedto the wheels and provide a very strong braking power.

In Figures 6 and 7 I show an alternate form of the invention, where thelinks 13 each consist of a pair of fiat elongated plates rivetedtogether at 15, 15, and with their ends letbcnt so as to be spaced apartto fur nish an intervening slot 14, to assist in pivoting the twolengths together. This pair of inter-pivoted links, though not each madeoi an integral piece of metal bentin U-torn1, serves a similar purposeand provides a foldable member which immediately upon the turn of thehand Wheel brings up the end of the chain a to the post 1 so that it maywind thereon.

Other changes and modifications in the details of the invention maybemade without exceeding the scope of the claims.

Having thus described my invention, what 1 claim as new and desire toseoureby Letters Patent is:

1. In a car brake device, the combination with. a chain, and a rotatablepost having a hand wheel thereon, of means connecting the post and thechain consisting of a pan of flat interpivoted U-shaped levers forming amember which is rigid against vertical movement but l'oldable in ahorizontal plane to bring the end of the chain up to the post so it maywind thereon. c

In a car brake device, the combination with a chain, and a "post havingmeans for manually revolving the same, of inter-pivoted Ushapedelongated link members connecting: the post with the chain and adaptedto be lolded around the post when the latter is revolved so as to causethe chain to be applied to the post for winding thereon.

3. In a car brake device, the combination with a chain and a rotarymember on the car, of means connecting said member with the chain,comprising inter-pivoted extended flat link members, whose endsinterengage in slots formedin such ends, in order that a foldable devicemay be provided to bring the end ol fthe chain quickly to the rotarymember when the latter is revolved, and thus prevent the chain fromspiralling down the shalt or rotary J'HGD'llJGl to a point where itwould doable over itself and decrease braking power.

at. In a car brake device, the combination with a chain ol interpivotedU-shaped links having kingitudinalslots therein and adapted to beironnected to the chain, a post,a hub thereon having a lag, means for"movably connecting the aforesaid links to said brake shoes, a rotarypost and means for rotating it, of means for quickly bringing the end ofthe chain up to the post consisting of a pair of interpivoted'linksconnected to the chainand pivoted toa hub on the post, said linksconsisting each of a pairof flat plates integral with each other-andhaving arib connection and a'longitudinal slot, all substantially asdescribed.

6. In a car brake device, the coinbination with a chain for transmittingmotion to the shoes, ofmeans for Winding up the chain I consisting of arotary post and a hub on said post, together with a member connectingthe chain and the hub and consisting of duplicate interpivoted U-shapedfiat links which operate as such member so as to be foldable 15 in ahorizontal plane, but non-flexible in a ertical plane in order that theend of the chain may be quickly brought up to the post to be woundthereon, and be prevented from spiralling down'the shaft to a pointWhere 2 0 it would double over itself and decrease braking power. a v

In testimony whereof I hereunto aflix my signature.

JOHN MoMULLEN. p

